12
CIVIL ENGINEERING Eect of piles on the seismic response of mosques minarets Mohamed Ahmed Abdel-Motaal  * Ain Shams Universi ty, Egypt Received 25 February 2013; revised 26 May 2013; accepted 12 June 2013 Available online 31 July 2013 KEYWORDS Minarets; High-rise building; Piles; Equivalent linear dynamic analysis; Soil–stru cture interactio n; Free eld Abstract  Minar ets seismic behavior is not similar to other known struct ures, becaus e of their unique characteristics such as slenderness, shape, and supporting system. This study is devoted to investigate pile foundation effects on minarets dynamic response. An advanced nite element models were employed to simulate this sophisticated problem. The analysis procedure is essentially 2-D model enhanced to satisfy the requirements of 3-D problems, using transmitting and viscous boundaries. Root mean square procedure is implemented to minimize the needed computer mem- ory. The model has a main advanta ge of consider ing the full interac tion between soil, foundat ion, and structure. Three articial earthquakes’ time histories were used as control motions at the bed- rock surface. Minaret (60.0-m height) was studied to investigate the effects of soil stiffness, pile length, diam- eter, and arran gemen t, on the minare t and pile dynamic behavior. Comparis on between study results and conventional analysis method is illustrated. Study results, discussion, and conclusion are given.  2013 Production and hosting by Elsevier B.V. on behalf of Ain Shams University. 1. Introduction Mosque minarets are the most characteristic features of the Is- lamic architecture. Func tion ally , the min aret is an eleva ted structure intended for the Adhan crier as he summons people for prayer  [1]. Recently, it became a tradition to attach a mac- erate to the religious construction. Along fourteen centuries, a lot of masonry minarets have been constructed in a variety of forms. Nowa days , the min arets are constructed from rein- forc ed concr ete that enabled both the architec ture and the structural engineer to innovate and design high-rise minarets. One of the most important problems facing the structural de- signer is the dynamic response of such structure under lateral loads, especially under the effect of earthquake excitation. The soil contact stress due to the heavy weight of these long minarets, over a relatively small area, may exceed the bearing capacity of the shallow soil layers. As a result, the choice of usin g pile founda tion arises as one of the most conve nien t solutions. In addition, it has also a major role on structural stability (sliding and overturning stability), under lateral loads. This study is devoted to investigate the effect of the pile foundation on the seismic response of the minarets structure. A wide range of dry sand formation (loose to very dense) is se- lected to simulat e the uppe r sand format ion. An exten sive st udy has been car rie d out to inv est iga te the effec t of pil e * Address: Department of Structural Engineering, Faculty of Engi- neering, Ain Shams University, Abba sia, Cairo 11517, Egypt. Tel. : +20 2 23054302, +20 12 73 72897; fax: +20 2 23054115. E-mail address:  [email protected]. Peer review under responsibility of Ain Shams University. Production and hosting by Elsevier Ain Shams Engineering Journal (2014)  5, 29–40 Ain Shams University Ain Shams Engineering Journal www.elsevier.com/locate/asej www.sciencedirect.com 2090-4479   2013 Production and hosting by Elsevier B.V. on behalf of Ain Shams University. http://dx.doi.org/10.1016/j.asej.2013.06.003

Minaret Design

Embed Size (px)

Citation preview

8/12/2019 Minaret Design

http://slidepdf.com/reader/full/minaret-design 2/12

8/12/2019 Minaret Design

http://slidepdf.com/reader/full/minaret-design 3/12

8/12/2019 Minaret Design

http://slidepdf.com/reader/full/minaret-design 4/12

8/12/2019 Minaret Design

http://slidepdf.com/reader/full/minaret-design 5/12

8/12/2019 Minaret Design

http://slidepdf.com/reader/full/minaret-design 6/12

8/12/2019 Minaret Design

http://slidepdf.com/reader/full/minaret-design 7/12

8/12/2019 Minaret Design

http://slidepdf.com/reader/full/minaret-design 8/12

8/12/2019 Minaret Design

http://slidepdf.com/reader/full/minaret-design 9/12

8/12/2019 Minaret Design

http://slidepdf.com/reader/full/minaret-design 10/12